<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 表单区域 -->
      <el-form class="login_form" ref="loginFormRef" :model="loginForm" :rules="loginFormRules">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" type="password" prefix-icon="iconfont icon-3702mima"></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="register">注册</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  data(){
      return {
        loginForm: { // 这是登录表单的数据绑定对象
          username: '',
          password: ''
        },
        loginFormRules: { // 这是表单的验证规则对象
          username: [ // 验证用户名是否合法
            { required: true, message: '请输入登录名称', trigger: 'blur' },
            { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
          ],
          password: [ // 验证密码是否合法
            { required: true, message: '请输入登录密码', trigger: 'blur' },
            { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
          ]
        }
    }
  },
  methods: {
      login() { // 点击登录按钮，调用后台登录接口，这里放在后面联调测试的时候再写
        // 表单预验证validate
        this.$refs['loginFormRef'].validate( async (valid) => {
          if (!valid) {
            this.$message.error('登录表单验证失败，请重新输入~！');
            return;
          }
          const {data: res} = await this.$http.post('/user/login',this.loginForm);
          // console.log(res);
          // console.log(res.data);
          // console.log(res.data.data.userId);
          // console.log(res.data.data.username);
          if (!res.success){ 
            this.$message.error(res.message);
            return;
          }
          this.$message({
            message: '恭喜你，成功登录~！',
            type: 'success'
          });
          //将用户数据保存到session中
          window.sessionStorage.setItem('username', res.data.data.username)
          window.sessionStorage.setItem('userId', res.data.data.userId)
          this.$router.push('/home'); // 成功则跳转到首页
        })
      },
      register() { // 注册
        this.$router.push('/register');
      }
    }
}
</script>
<style lang="less" scoped>
.login_container {
  height: 100%;
  background-color: #2b4b6b;
}
.login_box {
  height: 300px;
  width: 450px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #ddd;
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  padding: 0 20px;
  box-sizing: border-box;
  width: 100%;
}
.btns {
    display: flex;
    justify-content: center;
}
</style>